Ukraine on Tuesday unveiled a new protective cover over the destroyed Chernobyl nuclear reactor No.4, which would prevent the leakage of the radiation from the unit during the next century.

The Chernobyl disaster, one of the worst nuclear accidents in human history, happened on April 26, 1986, when a series of explosions ripped through the plant located 110 kilometers north of the Ukrainian capital of Kiev.

The blasts resulted in the demolition of the No.4 reactor and the spread of radiation across Ukraine, Belarus, Russia and other European countries.